Shelf unit



FIG. 1 is a top, front and right side perspective view of a shelf unit showing the first embodiment of my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof, with the left side being a mirror image of that shown;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a top, front and right side perspective view of a shelf unit showing the second embodiment of my new design;

FIG. 8 is a front elevational view thereof;

FIG. 9 is a rear elevational view thereof;

FIG. 10 is a right side elevational view thereof, with the left side being a mirror image of that shown;

FIG. 11 is a top plan view thereof; and,

FIG. 12 is a bottom plan view thereof. 

The ornamental design for a shelf unit, as shown and described. 